* Fix ./hooks/pre_gen_project.py asking user to select an option once only
+ prettify output
* Fix pre_gen hook not really exiting when it should
* Refactor & prettify ./hooks/post_gen_project.py
* Ensure same POSTGRES_USER is set across environments
+ get rid of env.example in favor of pre-generated .env.
The app name wasn't displayed correctly on the new relic dashboard.
Although `NEW_RELIC_APP_NAME` was set in `production.py`, the variable was not loaded *before* the newrelic agent was called.
Since the new relic agent is loaded at a very low level, NEW_RELIC_APP_NAME has to be set before django settings are imported.
